1 . 已知函数
在定义域内存在单调递减区间,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795a7764b7cc7e739a9ff784941a7da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . 已知函数
,
、
为其图像上任意两点,则直线
的斜率的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4c3ca8826cbce466966819824ff54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-04-22更新
|
505次组卷
|
2卷引用:2016-2017学年河南省南阳市高二下学期期中质量评估数学(理)试卷
名校
3 . 函数
的图象可能是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/9c4e7cca2049403f9cf909c315300eb4.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/1015b26d85664f7c93a6729c65aef079.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac53b8a14464ff2bfc7b985cb265e210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/6c73f3aa170d46089ff3b11f59c16a9a.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/9c4e7cca2049403f9cf909c315300eb4.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/74efd56ab33949298e4d988619bee929.png?resizew=171)
![](https://img.xkw.com/dksih/QBM/2016/10/3/1573054249730048/1573054255792128/STEM/1015b26d85664f7c93a6729c65aef079.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
591次组卷
|
8卷引用:2017届河南濮阳第一高级中学高三上学期检测二数学(理)试卷
4 . 已知函数
的图像在点
处的切线方程
,若函数
满足
(其中
为函数
的定义域),当
时,
恒成立,则称
为函数
的“转折点”.已知函数
在
上存在一个“转折点”,则
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9470db56f4397747215dcb7a48bd6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08daecc837cec158be1e170ed3139ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dd0d17ff2444639cb05bebb34610c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84df143e906b4737102fec72ba94ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d725b1ae56e7f998044d52aabb309ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78ecd96998bdc0afed2f344148ea04e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96896de9e4c7f4ceb8308d7f617a7ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
369次组卷
|
3卷引用:【市级联考】河南省洛阳市2019届高三上学期第二次联考高三数学(理科)试题
解题方法
5 . 已知b>a>0,ab=2,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8817eb77a192edb4f25df7033acb4606.png)
A.(﹣∞,﹣4] | B.(﹣∞,﹣4) |
C.(﹣∞,﹣2] | D.(﹣∞,﹣2) |
您最近一年使用:0次